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公开(公告)号：US4047862A
公开(公告)日：1977-09-13
申请号：US638242
申请日：1975-12-08
摘要： Cellulose ester fibrillar material is produced by forming a cellulose ester dope, pumping the dope to an extrusion orifice, extruding the dope through the orifice into a region of shear and high draw in a precipitation bath containing a non-solvent for said cellulose ester maintained at an elevated temperature. The fibrillar material is preferably subjected to further treatment to reduce the particle size and set the structure by expanding voids and expelling residual solvent. Paper having a high degree of opacity is produced by incorporating the cellulose ester material to obtain light weight paper.
摘要翻译： 通过形成纤维素酯原纤维材料来制备纤维素酯原纤维材料，通过将纺丝原液泵送到挤出孔口，将纺丝原液通过孔口挤出到剪切区域，并在含有维持在 温度升高。 优选对纤维状材料进行进一步处理以减小粒径并通过膨胀空隙并排出残余溶剂来设定结构。 具有高度不透明度的纸通过掺入纤维素酯材料获得轻质纸来生产。
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公开(公告)号：US4007745A
公开(公告)日：1977-02-15
申请号：US450530
申请日：1974-03-12
CPC分类号： A24D3/0204 , Y10S55/05
摘要： Improved aerosol filters, particularly cigarette filters, are prepared by imparting a patterned surface, preferably a plurality of longitudinal grooves, to a web of a synthetic thermoplastic fibrous material, preferably a tow of longitudinally aligned crimped continuous cellulose acetate filaments, and forming the resultant patterned web into a filter of the desired form.
摘要翻译： 改进的气溶胶过滤器，特别是香烟过滤嘴，是通过将图案化的表面，优选多个纵向凹槽赋予合成热塑性纤维材料的纤维网，优选纵向排列的卷曲的连续醋酸纤维素纤维丝束，并形成所得图案化 将其卷入所需形式的过滤器。
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